PX to REM Converter
Convert pixel values to rem and back again using the root font size your project actually uses.
Best For
Use PX to REM when you need to inspect, convert, compare, or package technical material quickly. The page is designed around a focused workflow: bring in the code, data, markup, URL, or technical file, make the adjustment or check, then copy or download the result for your repo, ticket, documentation, or handoff.
Most work happens locally in your browser, which keeps files and text on your device and makes quick repeat checks practical. Review the output, then copy or download the result for your repo, ticket, documentation, or handoff.
Common workflows
- Accessible Text Sizing
- Shopify Theme Edits
- Landing Page Handoffs
- Blog Readability Updates
Features
Two-Way Conversion
Switch between pixel-to-rem and rem-to-pixel conversion without needing a second calculator.
Custom Root Size
Use the root font size your project actually uses instead of assuming 16px.
Quick Output
Copy the converted result for CSS, design specs, or audits.
How It Works
Pick whether you are converting from pixels to rem or the other way around.
Use the default 16px or enter the value your project is based on.
The converted value updates immediately so you can paste it into code or documentation.
Frequently Asked Questions
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